Datasheet

7
®
DAC716
FIGURE 1. DAC716 Block Diagram.
FIGURE 2. Equivalent Circuit of Digital Inputs.
FIGURE 3. Relationship of Offset and Gain Adjustments.
Gain Adjustment
Apply the digital input that gives the maximum positive
voltage output. Adjust the gain potentiometer or the gain
adjust D/A converter for this positive full scale voltage.
GAIN AND OFFSET ADJUSTMENTS
Figure 3 illustrates the relationship of offset and gain adjust-
ments for a unipolar connected D/A converter. Offset should
be adjusted first to avoid interaction of adjustments. See
Table I for calibration values and codes. These adjustments
have a minimum range of ±0.3%.
Offset Adjustment
Apply the digital input code, 0000, that produces 0V and adjust
the offset potentiometer or the offset adjust D/A converter for
0V.
Shift Register
DAC Latch
14 12
+10V
Reference
8 6
7
DCOM
+V
CC
ACOM
V
REF OUT
Gain Adjust
4SDI
5SDO
16
2A
0
3A
1
1
16
CLK
CLR
15
– V
CC
Offset
Adjust

13
NC
11
NC
10
9
V
OUT
D/A Switches
–V
CC
+2.5V
15kΩ
180Ω
9.75kΩ
5kΩ

R
R = 1kΩ: A
0
, A
1
, CLK, CLR, SDI
ESD Protection Circuit
6.8V 5pF
Digital
Input
–V
CC
+V
CC

1LSB
Range of
Offset Adjust
Offset Adj.
Translates
the Line
Digital Input
FFFF
H
8000
H
0000
H
Analog Output
Full Scale
Range
Gain Adjust
Rotates the Line
Zero
Range of
Gain Adjust
≈ ±0.3%
≈ ±0.3%
+ Full Scale